In TraceFinder under the General Tab you can set select:

• Manual – typed in and manual adjusted for each confirming peak
• Average – calculates the average of the ratios across the calibration curve and uses that as the percent entry for the ratio
• Weighted Average – calculates the average of the ratios across the calibration curve with a weighting and uses that as the percent entry for the ratio
• Level – Uses a level that the use selects for calcualtion of the ratio

IF the user selects anything other manual, those values are not editable.

If the Curve or the level have not been completed, then with all other selections results for the samples before either the last calibration sample or the selected level will not have a ratio defined to flag against.

Uneditable ion ratios

Video For manual and other settings for ion range calculation